<template>
    <div>
        <div class="section">
            <div class="location">
                <span>当前位置：</span>
                <a href="/index.html">首页</a> &gt;
                <a href="/cart.html">购物车</a>
            </div>
        </div>

        <div class="section">
            <div class="wrapper">
                <div class="bg-wrap">
                    <!--购物车头部-->
                    <div class="cart-head clearfix">
                        <h2>
                            <i class="iconfont icon-cart"></i>我的购物车</h2>
                        <div class="cart-setp">
                            <ul>
                                <li class="first active">
                                    <div class="progress">
                                        <span>1</span>
                                        放进购物车
                                    </div>
                                </li>
                                <li>
                                    <div class="progress">
                                        <span>2</span>
                                        填写订单信息
                                    </div>
                                </li>
                                <li class="last">
                                    <div class="progress">
                                        <span>3</span>
                                        支付/确认订单
                                    </div>
                                </li>
                            </ul>
                        </div>
                    </div>
                    <!--购物车头部-->
                    <!--商品列表-->
                    <div class="cart-box">
                        <input id="jsondata" name="jsondata" type="hidden">
                        <table width="100%" align="center" class="cart-table" border="0" cellspacing="0" cellpadding="8">
                            <tbody>
                                <tr>
                                    <th width="48" align="center">
                                        <a>选择</a>
                                    </th>
                                    <th align="left" colspan="2">商品信息</th>
                                    <th width="84" align="left">单价</th>
                                    <th width="104" align="center">数量</th>
                                    <th width="104" align="left">金额(元)</th>
                                    <th width="54" align="center">操作</th>
                                </tr>
                                <tr v-for="(item,index) in goodsList" :key="item.id">
                                    <td align="center">
                                        <el-switch v-model="item.isSelected" active-color="#0094ff" inactive-color="#333333">
                                        </el-switch>
                                    </td>
                                    <td align="left" colspan="2">
                                        <div style="display:flex;align-items:center">
                                            <img width="50" height="50" :src="item.img_url" alt="">&nbsp;&nbsp;
                                            <span>{{item.title}}</span>
                                        </div>
                                    </td>
                                    <td align="left">
                                        {{item.sell_price}}
                                    </td>
                                    <td align="center">
                                        <inputnumber @numberChange="getChangedNumber" :initCount="item.buycount" :goodsId="item.id"></inputnumber>
                                    </td>
                                    <td align="left">
                                        {{item.sell_price * item.buycount}}
                                    </td>
                                    <td align="center">
                                        <a href="javascript:void(0)" @click="deleteGoods(item.id,index)">删 除</a>
                                    </td>
                                </tr>
                                <tr v-if="goodsList.length<=0">
                                    <td colspan="10">
                                        <div class="msg-tips">
                                            <div class="icon warning">
                                                <i class="iconfont icon-tip"></i>
                                            </div>
                                            <div class="info">
                                                <strong>购物车没有商品！</strong>
                                                <p>您的购物车为空，
                                                    <a href="/index.html">马上去购物</a>吧！</p>
                                            </div>
                                        </div>
                                    </td>
                                </tr>
                                <tr>
                                    <th align="right" colspan="8">
                                        已选择商品
                                        <b class="red" id="totalQuantity">{{getTotalCount}}</b> 件 &nbsp;&nbsp;&nbsp; 商品总金额（不含运费）：
                                        <span class="red">￥</span>
                                        <b class="red" id="totalAmount">{{getTotalPrice}}</b>元
                                    </th>
                                </tr>
                            </tbody>
                        </table>
                    </div>
                    <!--/商品列表-->
                    <!--购物车底部-->
                    <div class="cart-foot clearfix">
                        <div class="right-box">
                            <button class="button" @click="goBuy()">继续购物</button>
                            <button class="submit" @click="goToOrder()">立即结算</button>
                        </div>
                    </div>
                    <!--购物车底部-->
                </div>
            </div>
        </div>
    </div>
</template>

<style scoped>
</style>

<script>
    import { getLocalGoods } from '../../common/localStorageTool'

    //导入数量选择子组件
    import inputnumber from '../subcomponents/inputnumber'

    export default {
        data() {
            return {
                goodsList: []
            }
        },
        components: {
            inputnumber
        },
        computed: {
            //获取总数量
            getTotalCount() {
                let totalCount = 0
                this.goodsList.forEach(item => {
                    if (item.isSelected) {
                        totalCount += item.buycount
                    }
                })

                return totalCount
            },
            //获取总价格
            getTotalPrice() {
                let totalPrice = 0
                this.goodsList.forEach(item => {
                    if (item.isSelected) {
                        totalPrice += item.buycount * item.sell_price
                    }
                })

                return totalPrice
            }
        },
        created() {
            this.getGoodsListData()
        },
        methods: {
            //获取购物车中的商品列表
            getGoodsListData() {
                const localObj = getLocalGoods()

                let tempArray = []
                for (const key in localObj) {
                    tempArray.push(key)
                }

                if (tempArray.length <= 0) return

                //准备好url
                const url = `site/comment/getshopcargoods/${tempArray.join(',')}`

                this.$axios.get(url).then(response => {
                    response.data.message.forEach(item => {
                        item.buycount = localObj[item.id]
                        item.isSelected = true //每个按钮的初始值
                    });

                    this.goodsList = response.data.message
                })
            },
            //接收子组件传递过来的值
            getChangedNumber(changedGoods) {
                //1、重新结算购物车组件中总数量和总价格
                this.goodsList.forEach(item => {
                    if (changedGoods.goodsId == item.id) {
                        item.buycount = changedGoods.count
                    }
                })

                //2.调用vuex的方法，更新购物车徽标的值，以及localStorage中的值
                this.$store.commit('updateGoods', changedGoods)
            },
            deleteGoods(goodsId, index) {
                console.log(goodsId, index)

                this.$confirm('是否删除该商品?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                   //1.0 根据goodsId 删除localStorage中的数据
                   this.$store.commit('deleteGoodsById',goodsId)

                   //2.0 删除goodsList中的数据
                   this.goodsList.splice(index,1)
                }).catch(() => {
                   
                });
            },
            goBuy(){
                //没有带参数
                this.$router.push({path:'/site/goodslist'}) //导航方式1：通过path
                // this.$router.push({name:'goodslist'})
            },
            goToOrder(){
                //1、获取选中的商品的id，如果一个都没有，直接提示，不能下订单
                const ids = []

                this.goodsList.forEach(item=>{
                    if(item.isSelected){
                        ids.push(item.id)
                    }
                })

                if(ids.length<=0){
                    this.$message.error('请至少选择一个商品进行结算!');
                    return
                }

                //2.通过编程式导航，跳转到下订单组件(order.vue)中去
                this.$router.push(`/site/order/${ids.join(',')}`)
            }
        }
    }
</script>